[Q] AT&T One X + Tethering with International SIM

So I have a bit of a tricky question that I can't seem to find an answer for. My wife and I just move to Europe for work for 2 years. We had AT&T in the states, so my wife has an AT&T HTC One X+. We got our phones SIM unlocked before we left, and purchased French SIM cards that run on the Bouygues Telecom network. My phone (Lumia 925) can do wifi tethering no problem... My wife's on the other hand has issues. I keep getting the following error:
" There is a temporary network problem that prevents the enablement of the Mobile Hotspot function. Please retry later."
I have tried the following steps:
1. Rooting the phone.
2. Installing other hotspot apps (Both root and non-root)
3. Installed custom ROMs with hotfixes to remove AT&T data requirements.

I don't know if it's relevant, but when I do a reset on the phone, it doesn't automatically connect to Bouygues network for data. I have to manually add the APN every time. Once I do that, her mobile data works just fine, so I don't THINK that the APN is causing the problem...

Anyways, if anyone has an suggestions on how to fix this issue, I would be indebted to you... I've just never encountered this problem on any of my other Android devices and I have to believe that there is a simple solution to fix the problem that I've just not encountered. Thanks!!

Last edited by gandalf_alpha; 5th May 2014 at 02:13 PM.
Reason: Spelling corrections

XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality.Are you a developer?